Hi!
I'm looking for a uC that:
- It is Cortex-M0 or M0+,
- It isn't a Low Power device (L series) (no need to include Shottky diodes, and my app will be power hungry)
- It has internal EEPROM,
- 32 <= LQFP <= 64,
- It has 20+ free pins,
- and the most important thing: it must have a VBat pin. A CR2032 coin cell will keep the time and calendar.
You might wonder why I didn't use the STM32 mcu product selector chip selector. Of course I did; however, as far as I saw, a column that indicates whether the part has exposed the VBat pin or not doesn't exist.
There are myriad of parts to choose from, but it's imposible to review each one. Even worst (or better?), parts with less than 36 pins doesn't exposed the VBat pin.
For example, STM32G070 has the VBat pin exposed (LQFP >= 48), but it doesn't have eeprom.
In case such a thing doesn't exist, then I'm open to emulate the EEPROM with the mcu Flash, and the most dynamic data will be saved in the battery backedup RTC RAM.
Did I overlook something in the product selector, or there exist another way to verify, in a systematic way, whether a number part has (and it's exposed) the VBat pin?
Thank you in advanced!
